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/* $Id: vnode_cache.cpp $ */
/** @file
* Shared folders - Haiku Guest Additions, vnode cache header.
*/
/*
* Copyright (C) 2012-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*
* This code is based on:
*
* VirtualBox Guest Additions for Haiku.
* Copyright (c) 2011 Mike Smith <mike@scgtrp.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include "vboxsf.h"
#include "OpenHashTable.h"
struct HashTableDefinition
{
typedef uint32 KeyType;
typedef vboxsf_vnode ValueType;
size_t HashKey(uint32 key) const
{
return key;
}
size_t Hash(vboxsf_vnode* value) const
{
return HashKey(value->vnode);
}
bool Compare(uint32 key, vboxsf_vnode* value) const
{
return value->vnode == key;
}
vboxsf_vnode*& GetLink(vboxsf_vnode* value) const
{
return value->next;
}
};
static BOpenHashTable<HashTableDefinition> g_cache;
static ino_t g_nextVnid = 1;
mutex g_vnodeCacheLock;
extern "C" status_t vboxsf_new_vnode(PVBSFMAP map, PSHFLSTRING path, PSHFLSTRING name, vboxsf_vnode** p)
{
vboxsf_vnode* vn = (vboxsf_vnode*)malloc(sizeof(vboxsf_vnode));
if (vn == NULL)
return B_NO_MEMORY;
dprintf("creating new vnode at %p with path=%p (%s)\n", vn, path->String.utf8, path->String.utf8);
vn->map = map;
vn->path = path;
if (name)
vn->name = name;
else
{
const char* cname = strrchr((char*)path->String.utf8, '/');
if (!cname)
vn->name = path; // no slash, assume this *is* the filename
else
vn->name = make_shflstring(cname);
}
if (mutex_lock(&g_vnodeCacheLock) < B_OK)
{
free(vn);
return B_ERROR;
}
vn->vnode = g_nextVnid++;
*p = vn;
dprintf("vboxsf: allocated %p (path=%p name=%p)\n", vn, vn->path, vn->name);
status_t rv = g_cache.Insert(vn);
mutex_unlock(&g_vnodeCacheLock);
return rv;
}
extern "C" status_t vboxsf_get_vnode(fs_volume* volume, ino_t id, fs_vnode* vnode,
int* _type, uint32* _flags, bool reenter)
{
vboxsf_vnode* vn = g_cache.Lookup(id);
if (vn)
{
vnode->private_node = vn;
return B_OK;
}
return B_ERROR;
}
extern "C" status_t vboxsf_put_vnode(fs_volume* volume, fs_vnode* vnode, bool reenter)
{
g_cache.Remove((vboxsf_vnode*)vnode->private_node);
}
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